1. STUDY PURPOSE AND RATIONALE Intrauterine devices (IUDs) are an effective yet underutilized form of contraception in the United States. Only 5.5% of women age 15-44 reported using them in 2006-2008(Mosher 2010). Due to historical practices or prescribing recommendations, IUD insertion may be delayed if women must wait for results of screening for sexually transmitted infections (STIs) or for the beginning of their menstrual cycle. Such barriers are not as prevalent for other contraceptive methods. Initiation of oral contraceptive pills (OCPs), the vaginal ring, transdermal patches, and depot medroxyprogesterone acetate injection, with emergency contraception (EC) as indicated, is safely done on the same day of a woman's visit to her provider. This "Quick Start" approach improves access to birth control and has been well studied at the Family Planning Clinic at Columbia Presbyterian Medical Center and at other institutions (Westhoff 2002, Schafer 2006, Murthy 2005, Rickert 2007). The investigators providers often extend this practice to IUD insertion, but outcomes have not been formally assessed. If the investigators can show that insertion at any time is safe, the investigators can improve access.